Electronics Forum | Mon Feb 13 23:05:02 EST 2017 | swestheimer
I have been asked a very good question but have not been able to find a good answer. IPC for both PCB and PCBA refer to the X & Y dimensions to measure warp and twist but how would you determine the warp and twist for a round PCB or PCBA?
Electronics Forum | Thu Jul 22 05:00:45 EDT 1999 | George Verboven
| I have pcb's in which i am experiencing warping. | the boards are 12.8125" on a diagonal measurement. | they are out approximatley .010". | the boards are combination thru-hole,smt, they also have 3ounce copper.what is acceptable,and what is the pr
Electronics Forum | Thu Apr 20 13:55:31 EDT 2006 | cyber_wolf
Here is the problem : We have 2 AP25 printers with dedicated tooling. After we run side one boards through reflow, we get some warpage in our boards occasionally.(Sometimes we get a lot of warp depending on the geometries of the substrate) When the
Electronics Forum | Tue Jun 25 01:01:15 EDT 2002 | ianchan
Hi mates, has anyone ever done a DoE on the degree of warp PCB, after a SMT Reflow process? what were the findings and conclusion based on such a DoE? which were the critical (DoE) factors that influence the degree of warp PCB? any optimal reflow se
Electronics Forum | Mon Oct 03 19:15:32 EDT 2005 | cn
is this a single brd or multi up array? What is the thickness? where were the brds made, state/country? I had an issues with a brd which was fabed in mexico during the humid months there was mosture trapped in the brds which caused many strang things
Electronics Forum | Tue Aug 29 15:05:16 EDT 2006 | cyber_wolf
We run a lot of double sided boards. So I need a printer that will handle warped boards well. Can anyone tell me which printers work better on warped boards ? Our AP25's are crap on warped boards. If I had a penny for every time our cameras got kno
Electronics Forum | Wed Jul 21 12:19:01 EDT 2010 | mb_mfg
To eliminate warping during processing, we have provided customers with composite fixtures to support the board on all 4 edges, with retractable pull down claps that can be added to the top of the PCB after the screen printing. Simply by pushing the
Electronics Forum | Tue Jun 14 14:57:29 EDT 2022 | glasscake
Check for warp during reflow or placement, if your board is bowing you are not going to make a good solder connection. If your board is warping during reflow you may need to make a currier to support the board during reflow if using the edge to tran
Electronics Forum | Tue Jul 20 15:02:49 EDT 2010 | vetteboy86
I've seen this warp issue across several different PCB's we assemble. One of the biggest head ache's is getting the boards to transfer between machines, converyors, and inside our pick and place. Due to the warpage, transport between conveyors is dif
